Clean up blank lines in svn-dist.md

Removed extra blank lines in svn-dist.md.

Author: dave2wave

apache-trusted-release/svn-dist.md

@@ -88,7 +88,6 @@ flowchart TD
 
    - (b) ATR coexists on rsync.apache.org and detects legacy release addition and deletion.
 
-
 ```mermaid
 flowchart TD
     subgraph Transition 2B
@@ -106,7 +105,6 @@ flowchart TD
     end
 ```
 
-
 3. **Legacy is Retired** - `svn:dist/release` is retired.
 
 ```mermaid